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Ammonium Thiosulphate, also known as ammonium thiosulfate or diammonium thiosulfate, is an inorganic ammonium salt composed of ammonium ions and thiosulfate ions. Its chemical formula is (NH4)2S2O3, and its molecular weight is approximately 148.21 g/mol. This compound is a white crystalline solid that is highly soluble in water, making it suitable for preparing aqueous solutions in appropriate laboratory procedures. Ammonium Thiosulphate is relevant to analytical chemistry, inorganic chemistry experiments, and investigations involving sulfur-containing compounds and redox reactions. It has established applications in chemical analysis and photographic chemistry, while specialized procedures may use it in other technical investigations. Ammonium Thiosulphate Laboratory Reagent is suitable for experiments that specifically require this compound, subject to the required grade and method specifications. The 500 gram pack is a practical quantity for institutional laboratories and research facilities.
Product Specifications
| Specification | Details |
|---|---|
| Appearance | White crystalline powder |
| Assay | 99% |
| Chemical Name | Ammonium Thiosulphate |
| Alternate Names | Ammonium Thiosulfate, Diammonium Thiosulfate, Ammonium Hyposulfite |
| Molecular Formula | (NH4)2S2O3 |
| Empirical Formula | H4NOS |
| CAS Number | 7783-18-8 |
| Molecular Weight | 148.21 g/mol |
| Grade | LR Laboratory Reagent |
Key Features of Ammonium Thiosulphate
- Defined inorganic composition: Ammonium Thiosulphate consists of ammonium cations and thiosulfate anions, with the chemical formula (NH4)2S2O3.
- White crystalline solid: Its established physical form supports routine laboratory weighing and preparation of measured quantities.
- High water solubility: The compound dissolves readily in water, facilitating the preparation of aqueous reagent solutions.
- Sulfur-based chemical reactivity: The thiosulfate ion participates in characteristic chemical reactions relevant to inorganic and analytical chemistry.
- Laboratory research relevance: It is useful in suitable chemical analysis, reaction studies, and educational investigations requiring ammonium thiosulfate.
Laboratory Applications of Ammonium Thiosulphate
- Analytical chemistry: Used in selected analytical procedures that specify ammonium thiosulfate for the investigation of sulfur-containing species and related chemical reactions.
- Inorganic chemistry practicals: Suitable for supervised experiments examining ammonium salts, thiosulfate chemistry, and aqueous ionic reactions.
- Redox reaction studies: Can be used in appropriate investigations of oxidation-reduction behaviour involving thiosulfate ions, where specified by the experimental method.
- Photographic chemistry research: Relevant to selected studies of photographic fixing chemistry and silver-complex formation.
- Specialized chemical investigations: May be used in research procedures involving thiosulfate-based reactions, provided the compound and reagent grade meet the method requirements.
Why Choose Lab Wale to Buy Ammonium Thiosulphate
Lab Wale provides a convenient sourcing option for laboratory chemicals and scientific supplies for schools, colleges, universities, research centres, and professional laboratories. When purchasing Ammonium Thiosulphate, buyers should confirm the chemical identity, grade, and available specifications to ensure suitability for the intended procedure. Clear product information supports informed reagent selection and laboratory planning. Lab Wale serves educational and scientific institutions seeking laboratory chemicals for appropriate practical experiments, analytical procedures, and research applications.
Frequently Asked Questions About Ammonium Thiosulphate
What is Ammonium Thiosulphate used for in laboratories?
Ammonium Thiosulphate is used in selected chemical analysis procedures, inorganic chemistry investigations, and photographic fixing chemistry studies. It is also useful in experiments involving thiosulfate ions and their reactions. The specific application depends on the analytical method, required reagent grade, and experimental conditions.
What are the molecular formula and molecular weight of Ammonium Thiosulphate?
Ammonium Thiosulphate has the molecular formula (NH4)2S2O3 and a molecular weight of approximately 148.21 g/mol. Its empirical formula is H4NOS, which represents the simplest whole-number ratio of its constituent atoms.
What is the CAS number of Ammonium Thiosulphate?
The CAS Registry Number for Ammonium Thiosulphate is 7783-18-8. This identifier is associated with the anhydrous compound and helps distinguish it from other sulfur-containing ammonium salts. Confirm the chemical identity against the requirements of the intended laboratory procedure before purchasing.
Is Ammonium Thiosulphate suitable for educational and research laboratories?
Ammonium Thiosulphate may be suitable for supervised educational practicals, analytical chemistry, and research procedures that specifically require this reagent. Its suitability depends on the required grade, method, and experimental conditions. Laboratories should follow appropriate handling procedures and consult the relevant Safety Data Sheet before use.
How should Ammonium Thiosulphate be stored and handled safely?
Store Ammonium Thiosulphate in a tightly closed, compatible container in a dry, well-ventilated location. Avoid unnecessary moisture exposure and prevent dust formation during handling. Wear appropriate protective equipment and follow the Safety Data Sheet for storage compatibility, spill management, and waste disposal. Prevent release into drains or the environment.
Storage Conditions for Ammonium Thiosulphate
Store Ammonium Thiosulphate in a tightly closed, compatible container in a cool, dry, well-ventilated area. Protect the solid from unnecessary moisture exposure because the compound can be hygroscopic. Keep it properly labelled and segregated from incompatible chemicals. Follow the applicable Safety Data Sheet and institutional procedures for chemical storage.
Precautions for Handling Ammonium Thiosulphate
Review the current Safety Data Sheet before use. Wear suitable laboratory gloves, safety glasses, and protective clothing, and avoid unnecessary inhalation of dust or contact with the eyes and skin. Use adequate ventilation and prevent environmental release. Avoid mixing the compound with incompatible chemicals, particularly acids that may cause decomposition and release sulfur-containing gases. Follow established spill-response and waste-disposal procedures.


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